The Lezyne Matrix Air Cage is much more than just a way to hold your water bottle. It has a discreet built-in holder for an Apple AirTag, so you can track your bike using your phone, preventing it from being stolen. Please note that the AirTag is not included with this product. The cage is deigned in a way that hides the AirTag between the cage and the frame of the bike for extra security. The cage is built with Lezynes acclaimed Composite Matrix material which is waterproof to protect your tag and lightweight to fit in with your best bike. The cage is designed to easily access and load your bottle on the fly and comes complete with security bolts and a tool bit. The Lezyne Matrix Air Cage will help you keep your bike safe in the most practical way possible.